- In preparation for the peripheral blood mononuclear cell donation, the donor will undergo a detailed medical history and physical examination. Clinical studies will include blood chemistries (electrolytes, liver function and CRP) CBC with differential and platelets, PT/PTT, viral panel, EKG (age over 40 yrs), and chest x-ray (age over 40yrs). Fitness to donate cells for NK expansion will be evaluated by a physician not involved in the initial assessment of the exp-NK cell recipient for enrollment onto the protocol.